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• Petroleum Contaminated Material Stockpiles. All petroleum contaminated materials treated to <br />reduce TPH concentrations below 500 mg/kg will ultimately be disposed of in the solid waste <br />disposal area. Following the final removal of petroleum contaminated materials, the stockpile <br />footprint areas will be covered with a minimum of 4.3 inches of suitable topsoil and planted with <br />Seed Mix No. 1. It is anticipated that final reclamation of Phis area will occur in 2072, in conjunction <br />with final reclamation at the solid waste disposal area. <br />Sedimentation Ponds and Access Roads to These Ponds. Ponds 002, 003, and PECOCO reservoir have <br />been approved by CDMG as permanent impoundments. Pond 002 was approved as a permanent <br />impoundment in CDMG's Proposed Decision and Findings document dated December 31, 1986; PECOCO <br />was approved as a permanent impoundment in CDMG's Proposed Decision and Findings document dated <br />November 10, 1992; and, Pond 003 was approved as a permanent impoundment in CDMG's Proposed <br />Decision and Findings document dated June 6, 1997. <br />Appendix 7-6a presents the permanent pond demonstration for Pond 002, and the as-built is shown on <br />• Exhibit 7-8. Appendix 7-6b presents the permanent pond demonstration for Pond 003; the as-built is shown <br />on Exhibit 7-11. Appendix 7-6g presents the permanent pond demonstration for PECOCO; the as-built is <br />shown on Exhibit 7-18. <br />Seneca Coal Company, the postmine landowner for a portion of Pond 002 and all of Pond 003, has <br />requested that these ponds be left as permanent postmine features. SCC's request is presented in <br />Appendix 13-12a, Landowner Requests for Permanent Features. Request forms for the remaining portion of <br />Pond 002 and PECOCO have been submitted to the postmine landowners. Upon receipt by SCC, the <br />executed requests will be submitted to CDMG for insertion into Appendix 13-12a. <br />SCC also proposes to leave Ponds 004 and 008 as permanent impoundments. Leaving these pontls as <br />permanent features enhance the proposed post-mining land use of livestock grazing and wildl'rfe habitat. In <br />accordance with Rule 4.09.13, SCC has designed and constructed the ponds to approved CDMG criteria. <br />Appendix 7-6c, Sediment Pond No. 004, presents the permanent pond demonstration for Pond 004. <br />Appendix 7-6e, Sedimentation Structure 008, presents the permanent pond demonstration for Pond 008. <br />Forms requesting that these ponds remain as permanent postmine features have been mailed to the <br />• postmine landowner. Upon receipt by SCC, the executed <br />TR-37 13-47 Revised 01/06 <br />